<!DOCTYPE html>
<html>
<head lang="en">
	<meta charset="UTF-8">
<title>根据时间问好</title>
<script type="text/javascript">
var hour=prompt("请输入当前的小时数：","");

if(hour>6&&hour<13){
    document.write("<h2>上午好!欢迎来到贵美</h2>");
    for(var i=0;i>hour;i++){
        document.write("<img src='images/aftermoon.gif'>");
    }
}
else if(hour>12&&hour<21){
    document.write("<h2>下午好!欢迎来到贵美</h2>");
    for(var j=0;j<hour;j--){
        document.write("<img src='images/smile.gif'>");
    }
}
else{
    document.write("<h2>夜深了，该休息了！</h2>");
    for(var k= 0;k<hour;k++){
        document.write("<img src='images/moon.gif'>");
    }
}
</script>
</head>

<body>
</body>
</html>
